﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Media;
using System.Xml;

namespace LuanVanProject
{
    class utility
    {
        public static bool EqualsExtend(string filename, string _extend)
        {
            bool rs = false;
            int stringLeght = filename.Length;
            for (int i = stringLeght - 1; i > 0; i--)
            {
                if ((int)filename[i] == 46)
                {
                    int extendLeght = stringLeght - i - 1;
                    string extend = filename.Substring(i + 1, extendLeght);
                    if (extend.Equals(_extend))
                        rs = true;
                    return rs;
                }
            }
            return rs;
        }
        public static bool IsExisted(XmlNodeList list, XmlNode node)
        {
            foreach (XmlNode n in list)
            {
                if (n.InnerText == node.InnerText)
                    return true;
            }
            return false;
        }
        public static T FindChild<T>(DependencyObject parent, string childName) where T : DependencyObject
        {
            // Confirm parent and childName are valid. 
            if (parent == null) return null;

            T foundChild = null;

            int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
            for (int i = 0; i < childrenCount; i++)
            {
                var child = VisualTreeHelper.GetChild(parent, i);
                // If the child is not of the request child type child
                T childType = child as T;
                if (childType == null)
                {
                    // recursively drill down the tree
                    foundChild = FindChild<T>(child, childName);

                    // If the child is found, break so we do not overwrite the found child. 
                    if (foundChild != null) break;
                }
                else if (!string.IsNullOrEmpty(childName))
                {
                    var frameworkElement = child as FrameworkElement;
                    // If the child's name is set for search
                    if (frameworkElement != null && frameworkElement.Name == childName)
                    {
                        // if the child's name is of the request name
                        foundChild = (T)child;
                        break;
                    }
                }
                else
                {
                    // child element found.
                    foundChild = (T)child;
                    break;
                }
            }

            return foundChild;
        }
    }
}
